Monitor Says No Signal And Goes To Sleep [9 Ways To Fix]

Monitor Says No Signal And Goes To Sleep

Last night, I was working on my tablet when its battery was depleted; then I turned on my monitor, and my monitor says no signal, so I went to sleep.

At first, I restarted my monitor in the hope it might solve the issue, but it did not work; then I started researching, and after about an hour, I found out the solution for it.

In this article, we will dive into the possible solutions for how you can fix the no signal message on your monitor.

Let’s get started!

Why Does My Monitor Says No Signal And Goes To Sleep

When your monitor displays a “No Signal” message and goes to sleep, it usually signifies that it’s not receiving any input from the PC. 

This could be due to the fact that your computer might not be transmitting a signal, the video cable might be disconnected or faulty, or there is an issue with your video card or driver. 

To fix the issue, check the cables for any damage or loose connections, restart your system, or update video card drivers.

1. Bad HDMI Cable 

The HDMI cable serves as the conduit for signal transmission between the computer and the monitor. 

If the cable becomes faulty, the signal might not be transferred efficiently or might not get through at all. 

Symptoms of a bad HDMI cable might include a black screen, intermittent signal, flickering screen, or no signal at all.

In this case, replacing the HDMI cable with a new, high-quality one can resolve the issue.

2. Faulty DP or HDMI Port 

A faulty HDMI or DisplayPort (DP) could be a potential cause for the monitor indicating no signal and going to sleep. 

These ports are responsible for transmitting data between the computer and the monitor.

If they’re damaged or not functioning properly, they cannot transmit the necessary information, causing the monitor to display a “no signal” message. 

Various issues could lead to a faulty HDMI or DP port, including physical damage, outdated drivers, or improper cable connection.

It’s crucial to diagnose and promptly resolve the issue to restore your monitor’s functionality.

3. Incorrect Input Source 

An incorrect input source can also be a culprit behind the issue. It can occur if you’ve recently connected your computer to a different monitor or switched the type of connection, such as from HDMI to VGA. 

When the monitor doesn’t receive a valid signal from the correct input source, it can’t display any content and thus goes into sleep mode. 

Always ensure you’ve selected the right input source that corresponds to the type of connection you’re using.

Here are the steps to change the input source on the monitor:

  • Firstly, ensure that your computer and monitor are turned on.
  • Then, locate the “Input” or “Source” button on the monitor, which is typically found on the monitor’s front panel, side, or bottom.
  • Press this button to cycle through the available input sources such as HDMI, DisplayPort, DVI, or VGA. Continue pressing until you select the input that matches the cable connected from your computer to your monitor. 

4. Loose GPU 

When the GPU is not properly seated in the motherboard’s PCI-Express slot, it can cause the monitor to not display anything.

It can happen due to mishandling during installation, system movement, or even temperature fluctuations, causing expansion and contraction. 

A misaligned GPU can disrupt the communication between the motherboard and the graphics card, leading to the monitor not receiving any output signal. 

In that case, inspect the GPU seating and ensure it is firmly connected to overcome such issues.

5. Reset Monitor 

Resetting the monitor can often fix the “No Signal” issue. Before you start, ensure the monitor is powered off. 

Then, disconnect the monitor from the power source by pulling out the plug or switching off the power strip. 

Wait for at least a minute before plugging it back in. This break allows any residual power stored in the monitor to dissipate, effectively resetting it.

Now, turn on your monitor. If it was a temporary glitch causing the “No Signal” error, your monitor would function normally. 

If it doesn’t, there might be more serious hardware or software problems at play.

6. Outdated GPU Drivers 

The GPU is the heart of displaying graphics on the system, and if its drivers become outdated, it may not communicate effectively with the monitor, resulting in the ‘No Signal’ message. 

This is because the monitor is not receiving the necessary data to display an image. 

Updating the GPU drivers often resolves this issue, as the updated drivers include fixes for various bugs and compatibility issues. 

Here are the steps to update the drivers:

  • Type “Device Manager” into your start menu’s search bar, then select it from the list.
  • Now, expand the Display Adapters section; it will reveal the graphics card currently installed on your computer.
  • Right-click on the graphics card, then select the Update driver from the dropdown menu.
  • Choose Search automatically for updated driver software. 
  • If a new driver is found, the computer will download and install it automatically. If not, it means your current drivers are up to date.
  • Once the installation is complete, restart your computer to ensure the new drivers are properly implemented.

7. Disconnect All Peripherals 

Disconnecting all peripherals can be a beneficial step when troubleshooting monitor issues. 

This process involves unhooking all devices, such as keyboards, mice, and external drives from the computer. 

These peripherals can conflict with the system’s operation, causing the monitor to display a ‘no signal’ message and enter sleep mode. 

Eliminating these potential conflicts can help diagnose the root cause of the problem and determine if the issue lies within the computer itself or an external device.

8. Check Resolution Configuration

Computer monitors have specific resolutions at which they perform optimally.

If the resolution set on your computer doesn’t match the optimal or supported resolution of the monitor, it may not be able to display any image. 

To check this, navigate to your computer’s display settings. From here, you can adjust the resolution. 

Try setting it to the recommended resolution for your monitor. Remember to apply the changes before closing the settings window.

If the problem persists, it might be due to a different issue, and further troubleshooting may be needed.

9. Customer Support 

If you’re still facing the no signal issue on your monitor, then it might be time to get in touch with the manufacturer’s customer support.

Customer support will be able to provide you with other solutions or replacement/repair offers.

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Why does my monitor keep turning off and saying no signal? 

This typically indicates a disconnection or an issue between the computer and the monitor. 

The problem could lie with the video cable, video card, or the monitor itself. 

Faulty or loose cables often result in signal loss, so ensure the cables are properly connected. 

A malfunctioning video card, outdated drivers, or incompatible display settings could also cause this issue. 

How do I keep my monitor from going to sleep?

If your monitor keeps going to sleep, there are a few troubleshooting steps you can take. 

First, check the power settings. Navigate to the control panel, select “Power Options”, and ensure your monitor is not set to turn off after a brief period of inactivity. 

If necessary, adjust the settings to a longer time frame or select “Never” to prevent the monitor from sleeping. 

Second, examine the physical connections. Ensure that your monitor is securely connected to the computer and the power source.

Loose or damaged cables can cause intermittent sleep issues. Lastly, update your computer’s graphics driver. 

An outdated driver can cause a variety of display issues, including causing the monitor to sleep unexpectedly.

Why does my monitor lose signal after sleep?

Monitors losing signal after a computer has been put to sleep can be attributed to a variety of factors. 

One of the common culprits is a mismatch in the power settings of the monitor and the computer. 

In some cases, the computer may ‘wake up’ from sleep mode faster than the monitor, causing a temporary loss of signal.

Alternatively, outdated or incompatible graphics card drivers could also be causing this issue. 

It’s essential to update your drivers regularly to ensure smooth and efficient communication between your computer’s hardware components. 

Lastly, loose or damaged cables can also result in loss of signal. Always check your hardware connections to ensure they’re secure and in good condition.

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